Research in Astrophysics -- Solar Active regions

• Sigmoidal diagnostics with SOHO/CDS

Del Zanna, G.,  Mason,  H. E., Gibson, S.E., Pike, C. D., and  Mandrini, C. H., 2002, 
Adv. Space Res., Vol. 30, No. 3, 551  

This paper has many firsts. For the first time, spatially- and spectrally-resolved observations of a flare are presented. Temperatures, densities, blue-shifts, etc.
• EUV spectral observations of active region flares
  Del Zanna, G., Mason, H. E., & Foley, C. 2002,
  Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Czech Republic. Ed. A. Wilson. ESA SP-506, Vol. 2. Noordwijk: ESA Publications Division, ISBN 92-9092-816-6, 2002, p. 585 - 588
  
• SOHO-CDS observations of flares
  
  This is the talk I presented at the UK National Astronomical Meeting in Dublin, April 2003.
  It contains and expands the material presented in the above papers.

• Solar active regions: the footpoints of 1 MK loops
  G. Del Zanna, A&A, 2003, in press
  
  This is the first detailed study on the footpoints of 1 MK quiescent loops.
  On-disc SOHO and TRACE observations of the footpoints of 1 MK quiescent loops. Densities, temperatures, elemental abundances. Revision of some previous results based on Skylab data.
• Solar active regions: SOHO/CDS and TRACE observations of quiescent coronal loops
  G. Del Zanna and H.E. Mason, A&A, 2003, in press
  
  A new view of active regions is presented.
  Simultaneous SOHO/CDS and TRACE multifilter observations of quiescent loops are studied in detail for the first time.
  A critical review of all previous works on AR loops based on TRACE and CDS data is presented. More information can be provided upon request.
  A discussion of the diagnostic capabilities of the instruments is given.
  Densities, temperatures, elemental abundances of loops and of the diffuse background emission.
• Solar active regions: the 1 MK loops
  
  This is the talk I presented at the UK National Astronomical Meeting in Dublin, April 2003.
  It contains and expands the material presented in the two above papers.

  ---

• The Structure and Evolution of a Sigmoidal Active Region
  Gibson, S. E., Fletcher, L., Del Zanna, G., Pike, C. D., Mason, H. E., Mandrini, C. H., Démoulin, P., Gilbert, H., Burkepile, J., Holzer, T., Alexander, D., Liu, Y., Nitta, N., Qiu, J., Schmieder, B., & Thompson, B. J. 2002,
  Astrophysical Journal, 574, 1021-1038
  
  This is a colour version of the paper - Courtesy of Sarah Gibson
  This paper summarizes some observations of an active region multi-wavelength campaign to study sigmoids.
  More information can be found in the
  Sigmoid working group pages - led by Sarah Gibson
  and in these WWW pages

• Active Region studies with SOHO-CDS
  Mason, H.E. and Del Zanna, G., 2001,
  Proc. of the 35th ESLAB Symposium, PASP Conf. Ser., F. Favata and J. Drake eds.
  
  This is a review on spectroscopic diagnostics.

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